Lock.



H. W. SIMPSON.

LOCK.

APPLICATION FILED 52M. 24, 1901.

Patented Dec21,1909.

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UNIX STATES PATNT OFFICE.

HENRY W. SIMPSON, OF ITHACA, NEW YORK, ASSIGNOR T0 MARCUS E. CALKINS, OFITHACA, NEW YORK.

LOCK.

Specification of Letters Patent.

Patented Dec. 21, 1909.

Application filed September 24, 1907. Serial No. 394,268.

T 0 all whom it may concern:

Be it known that I, HENRY W. SIMPSON, a citizen of the United States,residing at Ithaca, in the county of Tompkins and State of New York,have invented certain new and useful Improvements in Locks, of which thefollowing is a specification.

My invention relates to improvements in locks of the type generallyknown as night latches viz., a lock in which the normal position of thelatch bolt is maintained in position within the latch keeper and whichcan always be operated by the knob on one side of the door (the innerside), the opposing knob being lockable to prevent operating thelatch-bolt excepting by the use of a key, the mechanism operated by thekey being so formed as to retract the bolt and thereby release the doorfrom the locked condition.

The main object of the present invention is to provide a structure forthis purpose in which the key escutcheon is located within the outerknob spindle, thereby eliminating the requirement of the use of anyopenings through the door excepting that formed to receive the knobspindles and the parts carried thereby, the parts located within saidopening being protected by a rose located on each knob spindle.

A further object is to provide a structure in which independentlyoperable knob spindles are employed, one of which is incapable of beinglocked against movement, the opposite spindle being provided with means,operative from the opposite side of the door, for positively locking thespindle against movement, each of the spindles having latch boltoperating means capable of moving said bolt in one direction, the latchbolt, however, being frce to be moved independent of either spindle.

A further object is the provision of means for operating the latch-boltby the use of a key, said means being normally out of the path ofmovement of the latch-bolt but being so arranged as to be carried intosaid path upon the use of the proper key, the projecting movement of theoperating means being limited to a single point in the path oflatch-bolt operating movement of the means, said means, in any otherposition being held in such position as to provide a movement in arotative direction without changing the relative planes of the latchboltand said means.

A further object is to provide a positive knob-spindle locking means,said means be ing operated from the opposite side of the door to that onwhich the spindle to be locked is mounted.

Other objects, including the provision of specific means and structuresfor producing the results heretofore indicated, will be readilyperceived and understood as the invention is hereinafter disclosed.

To these and other ends my invention consists in the improvedconstruction and combiuation of parts hereinafter fully described,illustrated in the accompanying drawings, and particularly pointed outin the appended claims.

In the drawings, in which similar reference characters indicate similarparts in each of the views,Figure l is a view, partly in front elevationand partly in vertical section, showing my invention, the latch-boltbeing omitted, with the exception of a section of its connecting rod.Fig. 2 is a sectional view taken on line 00-w of Fig. 1, the latch-boltcarrier being shown in elevation. Fig. 3 is a view similar to Fig. 1 buttaken on a line at right angles thereto. Fig. t is a sectional viewtaken on line 2-5 of Fig. 3. Fig. 5 is a detail perspective View of theoperating mechanism carried by the knob spindle on the outer side of thedoor. Fig. 6 is a perspective sectional view of the lock casing, and adetail perspective view of the operating mechanism carried by theknob-spindle on the inner side of the door, the knob-spindle lockingmeans for the outer knob spindle being shown in detail. Fig. 7 is aperspective view of the latch bolt and its carrier. Fig. 8 is'aperspective view of the operating barrel. Fig. 9 is a similar view ofthe opposite side thereof. Fig. 10 is a perspective view of the barrelcasing and the barrel therein in normal position. Fig. 11 is a similarview showing the barrel in projected position. Fig. 12 is a sideelevation of the barrel and easing, the latter being shown in section,the parts being shown in normal or retracted position. Fig. 13 is asimilar view, the parts being shown in projected position. Fig. 14: is across-sectional view taken on line yy of Fig. 13. Fig. 15 is a detailview of a key for operating the barrel. Fig. 16 is a side view of thebarrel in a projected position, the casing being shown in section.

Referring to Figs. 1 to 6, 3O designates a cylindrical casing of a widthslightly less than the thickness of the door, said cas ing being adaptedto be mounted in an opening extending through the door, communicatingwith which is an opening leading to the edge of the door, the latterbeing suitably mortised to receive the mortised edge plate through whichthe latch bolt is adapted to operate, said plate being of any preferredform and not forming any particular part of the present invention. Thedoor and its opening are not shown in the drawings, as it is believedunnecessary to particularly show these parts, the arrangement beingobvious. 32 designates the edge plate or keeper located in the door amband having an opening to receive the end of the latch bolt whenprojected, said edge plate also being of any preferred form. The casing30 is provided on its inner periphery adjacent its side edges withsuitable bayonet slots 33, shown in Fig. 6 adapted to receive the lugs34 formed on the flange 35 of a sleeve 36 loosely mounted on a tubularcasing 37, the outer end of which is suitably secured in the door knob38. If desired the sleeve 36 may be secured against a rotative movementto free the bayonet slot connection, by the passage of a screw or pinthrough the casing 30 and into the periphery of the flange 35, and ismade with respect to one side, prior to the insertion of the casingwithin the opening in the door, the connection on the opposite sidebeing made after the parts have been inserted in the door, the partsbeing pushed through the door a sufficient distance to permit this to bedone. To properly position the casing 30 within the door, I provide theroses 39, each of said roses having a screw-threaded connection with oneof the sleeves 36, the construction being such, that when the easing 30and the sleeve 36 are mounted within the door, and the roses 39 arescrewed up tightly against the faces of the door, rela tive movement ofthe casing 30, the sleeve 36, and the roses 39 will be prevented. Theoutside door knob is provided with a suitable rotatable key enteringplate 40, through which the key is adapted to be inserted into thebarrel and tumbler mechanism, presently described.

41 designates the latch bolt, having its outer face inclined, and havingits inner end connected by a rod 42 with a latch bolt carrier 43, asbest shown in Fig. 7. The carrier 43 is located within the casing 30,the rod 42 extending outwardly through an opening 44 in the casing 30,the bolt 41 extending into and being adapted to be projected out of theedge plate 31, the latch bolt having one of its side faces provided witharrecess 45 extending laterally, within which is mounted a roller 46,retained in position by a pin 47 engaging in a groove 48 formed in theroller 45, the construction being such that the outer surface of theroller projects beyond the lane of the side face of the latch bolt toprovide an anti-friction bearing for said bolt. A spring 49 isinterposed between the inner end of the latch bolt and the outer face ofthe casing 30, said spring tending to retain the latch bolt in aprojected position. Owing to the relatively fixed position of the latchbolt within the edge plate 31, the passage of the rod 42 through thecasing will prevent any rotative movement of the casing after the partshave been assembled and placed in the door.

Secured within the casing 30 at a point diametrically opposite theopening 44 is an inwardly-extending lug 50, extending in a directionaxially of said casing and held against movement relative to said casingby suitable means such as a screw 51 and interlocking pins The lugextends inwardly a suitable distance and has its inner face piovided atits edges, with inwardlyextcnding flanges adapted to be received withinthe barrel casings hereinafter described for the purpose of retainingthe latter against a rotative movement within the knob spindle ortubular casing 37.

The carrier 43 is preferably formed as shown in detail in Fig. 7 beingoval in general configuration in side elevation with the ends of theoval flattened. Said carrier adjacent its rear edge is provided with arectangular opening 54 extending laterally through the carrier, thelatter having its rear wall cut away as at 55 to form a passage wayleading to the opening 54. If desired, however, the opening 54 mayextend but partially through the carrier. Said carrier, when in positionwithin the casing 30, ms its rear spaced edges straddling the lug 50,the movement of said carrier causing the inner face of said lug to passinto the opening 54 to a greater or less extent depending upon thedirection of movement of the carrier. The rear portion of the carrier isprovided with laterally-extending flanges 56, presenting abutments whichserve as cam surfaces to retract the latch bolt when the knobs aremanipulated as hereinafter described. One of the flanges 56 of thecarrier is also recessed, as at 56, for a purpose hereinafter pointedout. Each of the knob spindles 37 has its inner end provided with anannular flange 57, said flange having its inner face provided with asemi-circular plate 58 forming abutments which, when the parts areassembled, are adapted to co-act with the abutments on the carrier 43 toretract the latch bolt.

It will be understood that the parts above described, When assembled,will permit of the ordinary functions of a knob-operated latch bolt, themovement of either knob retracting the latch bolt by reason of theopposing surfaces of the abutments or cam surfaces of the knob spindleand the latch bolt carrier, and that when the knob is released, thespring 19 will automatically return the latch bolt and its carrier toits outer or projected position. In the present case, the latch bolt isnot locked against a retracting movement, the device being in the formof a night-latch, in which only the outer door-knob is locked against arotative movement, the inner-knob being free to operate the latch boltat any time. The locking of the outer knob is obtained by the followingmeans: As shown best in Fig. 6, the casing 30 has its periphery providedwith a laterally-extending projecting portion 80, preferably located atthe top of the casing 30 (it being shown at the bottom in said figurefor clearness), said projecting portion having an opening 81 extendinglongitudinally of the projection (laterally of the casing) in whichopening is mounted a spindle 82 having a groove 83 intermediate itsends, said groove extending partially around the spindle and forming apassageway within which the inner end of a screw 84: may ride, as shownin Fig. 1, said screw serving to prevent longitudinal movement of thespindle but permitting a rotative movement thereof within certainlimits. One end of the spindle 82 is provided with a projecting pin 85mounted eccentrically of the end surface of the spindle, said pin beingadapted to be retained within an opening 86 of proper shape, formed in areciprocating element 87 which forms the locking element, said elementbeing mounted within the casing 30 and projection and movable in adirection radially of the casing 30. Said element is spring-supported tonormally retain it in its projected position, one form of mounting beingshown in Fig. (3, wherein the spring 88 is shown as extendinglongitudinally of the projection 80 and having one end engaging with theelement 87. The opposing end of the spindle is formed with a squaredshank S8 to receive a complemental member of an operating lever 89, thelatter, when in position on the inner side of the door being locatedbetween the rose 39 and the surface of the door, the rose being in twoparts and one recessed to permit the pivotal movement of the spindle andits operating lever. The opening 86 is so formed that the pivotalmovement of the spindle 82, carrying the pin in a concentric path ofmovement, will ride along the upper surface of the opening withoutappreciably affecting the position of the element 87, the shape of theopening at this point practically corresponding with the path ofmovement of the pin 85.

After the pin has passed to a point beyond the vertical diameter of theend of the spindle, its further movement will be in a direction topermit the spring 88 to project the inner end of the element 87 withinthe plane of the inner periphery of the casing 30, this movement beingcontinued until the element 87 has been projected its proper distance.Upon a return movement of the lever, the pin will retract the element 87until the inner limit of movement, of the element is reached. whereuponthe further movement of the pin will simply cause it to ride against theupper edge of the opening 86, this latter movement, being the equivalentof two opposing cam surfaces having concentric planes, substantiallypreventing any liability of the element 87 passing into the interior ofthe casing until the operating lever 89 is again moved.

As before stated, the element 87 is projected, by its spring, into theinterior of the casing 80. To permit of its performing the lockingfunction, the flange 57 is provided with two diametrically-opposedrecesses 91, one of which is to be placed in active use, the tworecesses being provided for the purpose of accommodating the necessarychange in position of the parts when the lock is used either as a rightor left hand latch. Said recess is in the plane of the projectingelement 8?, so thatwhen said element is released by the movement of thepin 85, as above described, said element will pass within one of therecesses 91 and thereby ei'l'ectually prevent rotation of the outerknob. And as the element 87 is spring supported in the direction ofmovement required to enter the recess 91, there is no liability of abreakage of parts should the knob spindle be out of its true positionwhen the operating lever is manipulated. the face of the element simplyriding on the periphery of the flange 57 until the proper relativepositions are reached, whereupon the spring will project the elementinto the recess. By reason of the fact that the projecting end of theelement S7 is formed with right-angles, the recesses 91 beingcorrespondingly formed, there is no liability of the element beingforced out of the recess by the use of excessive pressure in a rotativedirection placed en the knob.

From the above description it will be understood that the knob spindleon the outer side of the door may be locked against movement from apoint on the inner side of the door without affecting the position orthe operation of the inner knob spindle or the latch bolt. As it isnecessary, however, that the door may be operated from the outer side,provision must be made either to unlock the outer knob spindle or tooperate the latch-bolt independently of the knob spin dle. The latterconstruction is that pref- Cit erably used in connection with theinvention, and the construction is so applied as to pro vide anoperating mechanism actuated by a barrel and tumbler structure locatedin the outer door knob, no other opening being located in the door as apart of the lock herein described. And owing to the particular structureof barrel and tumbler mechanism described, practically innumerable keychanges may be made, as will be readily understood.

To operate the latch bolt, by the use of a key, in a direction toretract said bolt, 1 make use of an operating element (in the form of alug) 7 5 mounted on the end of a barrel having both a rotative and alongitudinal movement, the element, in its operative position, lyingwithout the path of move ment of the latch-bolt carrier, the insertionof a key and a longitudinal movement of the barrel, followed by rotativemovement of the barrel while in its projected position, cansing theelement to withdraw the latcl1bolt and permit of the opening of thedoor. After the door has been opened, the key is released from pressure,thereby permitting the lug 7 5 to be returned to its normal position bythe return movement of the latchbolt through its spring 49, and a springhereinafter described, leaving the parts in normal position with theouter knob still locked but with the door open, ready to be again lookedupon its being closed to a position where the latch-bolt can again enterits keeper.

The general construction of the barrel and tumbler mechanism preferablyused in connection with my latch-bolt, is that contained in myapplication for Letters-Patent, filed Sept. 2%, 1907, Serial Number$992,266, but owing to the special purposes required of such mechanismin connection with the work to be performed, certain modificationstherein are made, and these are particularly pointed out herein inconnection with a general description of such mechanism, a more detaileddescription of the latter being found in the application aboveindicated. It is to be noted, however, that in the pres entconstruction, the key and tumbler mechanism is located on but one sideof the door (that corresponding with the outer knobspindle) 59designates the barrel casing in the form of a tube open at both ends,said casing having at one end a recess 60 to receive the flange 53, asbest shown in Fig. 5, by which construction the barrel casing is heldfrom rotative movement. Longitudinal movement of the casing within theknob spindle in a direction toward the outer end of the knob isprevented by the contact of the end of the casing with the key-enteringplate 40, and in the opposite direction by the inner wall of the recess60 engaging the outer face of the flange 53. The casing is also providedwith slits 61 extending crosswise of the casing on opposite sidesthereof, said slits receiving bars 62, the slits being of sufficientdepth to permit the inner face of the bars to project within the innerperiphery of the casing, the slits being located at any predeterminedpoint in the length of the casing; the outer surfaces of the bars 62 arerounded to conform to the outer periphery of the casing and are rigidlysecured to the casing 59.

65 designates the barrel which consists of the tumbler-carrying member66 and the tumblers 67. The member 66 is formed substantially as shown,being of a length approximating the length of the casing 59. Une of itsends 68, which is opposite the key-inserting end, is circular in crosssection and adapted to fit the interior of the casing, the relativesizes being such as to permit a relative movement of the member 66 andthe casing. The end 68 is provided with a circumferential groove 69spaced from and parallel with the surface of said end. A screw or pin 68extends through the casing 59, the inner end of said pin extending intosaid groove 69. The member 66 is also provided with alongitudinally-extending bar 70, semi-circular in cross-section andhaving an area approximate half the area of a crosssection of the end68, said bar being of a suitable length. Extending radially from thecenter of the flattened surface of the bar 70 is a plate 71 whichextends longitudinally of the barrel and is of such length as toterminate approximately the free end of the ar 7 O, a kerf 72 beingformed between the flattened surface of the bar and the inner edge ofthe plate, said kerf extending inw dly a suitable distance. The bar 70is provided with a circumferentially-extending groove 73, at anypredetermined point in its length, and the plate 71 is also providedwith a recess '74, one end of which corresponds in position with thegroove 7 3. The end 68 of the member 66 is provided with an operatingelement '75, in the form of a lug or projection having its outer facecurved concentrically with the curvature of the end 68, as bestillustrated in Fig. 2, the distance between the periphery of the end 68and the preiphedy of the lug 75 corresponding to the thickness of thewall of the casing 59. The tumblers 67, two of which are shown in thedrawings, are formed substantially as shown, each having a generalcross-sectional shape of a right-angle triangle, the outer side of whichis rounded. The tumblers are adapted to be seated in the ways formed oneach side of the plate 71, and the curvature of their outer facescorresponds to the curvature of the inner barrel. Each tumbler isprovided with a circumferentially-extending groove 76 and an extendedrecess 77. Each tumbler is normally retained in an outer position bymeans of a spring 78 interposed between the end of the tumbler and awall of the end 68. One end of each tumbler has a surface exposed to theplane of the kerf 72, and said surface is provided with a projecting pin79 which, together with a pin 20 located on the opposite face of the bar66, provides the guides for the key wards and the tumbler-moving devicesby means of which the parts are placed in position where rotativemovement may be had. The key is provided with longitudinally-extendinggrooves 22, of such length as to provide a construction such that whenthe groove which receives the pin 20 has reached its limit of movement,the several tumblers will have been moved to a position where thegrooves 76 will be in alinement with the groove 73, and thereby form asubstantially complete groove around the periphery of the barrel. Inview of the fact that the bars 62 are so located that, when the key hasreached its movement to position the tumblers, they will lie within theplane of the groove 73 and grooves 76, it will be understood that inthis position, movement of the barrel relatively to the casing 59 may behad.

The particular construction and, arrangement of the barrel and tumblerso far described, and which pertains solely to the rotative movement ofthe barrel within the casing, is not herein specifically claimed, assuch structure forms the subject-matter of the application for LettersPatent heretofore identified. Therefore, I do not herein furtherdescribe the particular construction of the parts, it being understoodthat the tumblers when unacted upon by the key are so located relativelyto one of the bars 62, as to prevent the rotative movement of thebarrel, but when acted upon, as above described, to carry the tumblersand barrel into position where the bars 62 may ride within the groove76, which also changes the position of the other parts, as hereinafterdescribed, such rotative movement may be had, the inwardly-projectingend of the pin 68 riding within the groove 69.

The normal position of the lug 75 is that wherein it lies within arecess 63 formed in the end of the barrel casing, in which position theknob can be rotated to operate the latch bolt in the manner heretoforedescribed, the lug 75 presenting no obstruction to the passage of thecarrier 43 in the direction to retract the latch bolt.

The longitudinal movement of the barrel within the barrel casing is madepossible by the following additional arrangement of corelating parts:The end 68 of the barrel is provided with a groove 24 leading from thegroove 69 to the outer surface of said end, said groove being locateddiametrically opposite the lug 75, the pin 68 being so positioned in thebarrel casing to lie within or parallel with the groove 24L when thebarrel is in its normal position; also in providing a flat side 25 onthe periphery of the bar 70 adjacent the groove 73, such flat side lyingintermediate the grooves 69 and 73, said flat side being so positionedthat when the lug is in normal position, one of the bars (32 will be incontact therewith. It is to be understood that the plate 71 and thetumblers also have recesses or flat sides which will permit the opposingbar 62 to pass when the lug 7:3 is in its normal position. Thisconstruction prevents a rotative movement of the barrel when the lug 75is in its normal position, but permits a longitudinal movement thereofin a direction to project said lug 7 this movement carrying the pin (38into the groove 69 and the bars 62 into the plane of the grooves 73,741, and 7 6, this movement being obtained by the insertion of theproper key which causes a movement of the tumblers the proper distanceand then a movement of the barrel as an entirety to the proper position.lVhen the parts have been so moved, rotative movement of the barrel maybe obtained by simply turning the key. As the longitudinal movement ofthe barrel has carried the lug 75 into the opening or recess 5st, arotative movement of the barrel by the key will carry said lug intocontact with the rear walls of the opening 54 and a continued movementin the same direction will move the carrier in a direction to retractthe latchbolt. As soon as the rotative movement has begun the barrel islocked against longitudinal movement'by the pin 68 and the bars 62.lVhile the key will readily move the barrel in a longitudinal directionto project the lug, the key is not so formed as to retract it afterbeing projected, hence I have provided auxiliary mechanism forretracting the barrel, which mechanism 1 will now describe.

Mounted within a longitudinal recess 27 formed in the bar 70 adjacentits outer end, is a spring 26 and a follower block 90, the latter beinglocated at the inner end of said recess. A eircumferentially-extendingkerf 28 is formed in the barrel casing at a point corresponding with theposition of the follower block 90 when the barrel is in its normalposition, and within said groove projects a radially-extending pin 29carried by the follower-block 90, said pin being of sufficient length toproject into the kerf 28 but not beyond the periphery of the barrelcasing. When the barrel is in its normal position, the pin 29 will belocated at a point substantially midway of the length of the kerf 28, ifit is desired that the mechanism be such as to permit 'an' unlockingmovement of the barrel by a r'otative movement of the key in eitherdirection, or at one end of said kerf, if such unlocking movement is tobe confined to a movement of the key in but one direction. And in suchposition of the parts, the follower-block will lie at the inner extremeof its movement. When the barrel is moved longitudinally, however, thefollower-block will have a relatively'opposing movement (due to theinability of the pin 29 to move longitudinally), thereby placing theblock under the tension of the spring 26. The rotative movement of thebarrel now takes place, during which movement the pin 29 rides withinthe kerf 28, retaining the follower block under tension. After thelatch-bolt has been retracted and the door opened, a release of the keywill permit the spring 4L9 to project the latchbolt, which movementcauses the lug to be moved in a direction to return it to the plane ofits normal position. lVhen the barrel has reached such position, thespring 26 will operate to retract the barrel, thus carrying the lug toits normal or inoperative position, leaving the face of the barrelcasing practically free of projections. It will be understood that thelength of the kerf 28 is suflicient only to permit of the necessaryrotative movement of the barrel to retract the latch-bolt, and it willbe obvious that the contact of the pin 29 with the end of such kerf,will limit the rotative movement of the barrel in its casing.

WVhile the advantages of the construction set forth are many I haveherein shown and described one form of lock mechanism which will producethe results desired by me and heretofore indicated, it is to beunderstood that the specific structure shown and described does notcomprise all of the structures which might be employed for this purpose.I do not, therefore, limit myself to the specific structures shown indetail, but claim the right to use any and all modifications thereofwhich may fall within the spirit and scope of the invention as disclosedin the claims hereto appended.

Having thus described my invention, what I claim as new is:

1. In a look, a normally projected latch bolt, independent latch boltoperating members mounted on opposite sides of the door forretractingsaid latch bolt, the plane of the axis of said members intersecting thepath of movement of the latch-bolt, said members being spaced apart topermit movement of the latch-bolt therebetween, means for locking one ofsaid members against movement, and a key-operated member carried by thelocked member for retracting the bolt.

2. In a lock, a normally projected latch bolt, independent operatingmembers mounted on opposite sides of the door for retract; ing saidlatch bolt, means for locking one of said members against movement, anda keyoperated longitudinally-movable member carried by the locked memberfor retracting the bolt, the key-operated member being movable toretract the bolt when the member is at one extreme of its longitudinalmovement, the movements of the lockable member and the key-operatedmember being independent of each other.

3. In a lock, a reciprocating latch-bolt normally retained in aprojected position, and independent members for retracting thelatch-bolt from one side of a door, said members being mounted onewithin the other, one of said members being positively held against anymovement other than that imparted to it by a key, said member beingnormally out of bolt-retracting position and movable longitudinally toposition it in retracting position.

I. In a lock, a reciprocating latch-bolt normally retained in aprojected position, and independent members for retracting thelatch-bolt from one side of a door, said members being mounted onewithin the other, one of said members being normally out ofboltretracting position and movable longitudinally to position it insuch retracting position, the movement of either member beingindependent of the movement of the other member.

In a lock, a reciprocating latch-bolt normally retained in a projectedposition, 7

and independentmembers for retracting the latch-bolt from one side of adoor, said members being mounted one within the other, one of saidmembers being normally out of boltretracting position and movablelongitudinally to position it in such retracting po sition, each of saidmembers being lockable, the retracting movement of the members beingpivotal, the pivotal movements being in either direction.

6. In a lock, a reciprocating latch-bolt normally retained in aprojected position, and independent members for retracting thelatch-bolt from one side of a door, said members being mounted onewithin the other, one of said members being normally out ofboltretracting position and movable longitudinally to position it insuch retracting position, the movementof either member being independentof the m vement of the other member, each of said members beinglockable.

7. In a lock, a reciprocating latch-bolt normally retained in aprojected position, and independent members for retracting thelatch-bolt from one side of a door, said members each being lockableagainst retracting movement and mounted one within the other, one ofsaid members being normally out of bolt-retracting position and movablelongitudinally to position it in such retracting position, the movementof either ll'ltllll)"l being independentfof the tHOVQlliClU. of theother member, one of said members being normally in locked position,means operated i from the opposite side of the door for locking theother member against movement, and a key for unlocking thenormally-locked member.

8. In a look, a reciprocating latch-bolt, normally retained in aprojected position. and independent members for retracting thelatch-bolt from one side of a door, said mene bers being mounted oneWithin the other, the movement of either member being independent of themovement of the other member, one of said members being normally inlocked position and out of the path of the latch-bolt, and a key formoving said member into the pat-h of the latch bolt and operating it ina manner to retract the latch bolt.

9. In a look, a reciprocating latch-bolt normally retained in aprojected position, and independent members for retracting thelatch-bolt from one side of a door, said members being mounted oneWithin the other, the movement of either member being independent of themovementof the other member, one of said members being normally inlocked position and out of the path of the latch bolt, and a key formoving said member into the path of the latch bolt and operating it in amanner to retract the latch bolt, the other member being lockable andunlockable only from the opposite side of the door.

10. In a look, a reciprocating latch-bolt normally retained in aprojected position, and independent members for retracting thelatch-bolt from one side of a door, said members being mounted oneWithin the other, the movement of either member being independent of themovement of the other member, one of said members being normally inlocked position and out of the path of the latch bolt, and a key formoving said member into the path of the latch bolt and operating it in amanner to retract the latch bolt, the other member being lockable andunlockable only from the opposite side of the door, the position andlocked condition of the lockable member being unaffected by the movementof the key-operated member.

11. In a lock, a normally-projected latchbolt, a carrier therefor,independent members mounted on opposite sides of the door for movingsaid carrier in a direction to retract the bolt, one of said membersbeing lockable against movement, and an independent key-operated membermovable into the path of said carrier for retracting said bolt When thelockable member has been locked.

12. In a lock, a normally-projected latchbolt, a carrier therefor, andindependent members for retracting said bolt, one of said members lyingWithin the path of the carrier, the other member normally lying Withoutthe path of the carrier but movable thereinto.

15-). In a look, a normally-projected latchbolt, a carrier therefor,independent members for retracting said bolt, one of said members lyingwithin the path of the carrier, the other member normally lying Withoutthe path of the carrier, and a key for moving said member into the pathof the carrier and moving it in such position to retract the bolt.

l l. In a lock, av normally-projected latchbolt, a carrier therefor,independent members for retracting said bolt, one of said members lyingwithin the path of the car rier, means for locking said member againstmovement, the other member normally lying without the path of thecarrier but movable thereinto, and a key for moving said latter memberin its projected position to retract the bolt.

15. In a lock, a normally-projected latchbolt, a carrier therefor,independent members for retracting said bolt, one of said members lyingwithin the path of the carrier, means for locking said member againstmovement, the other member normally lying Without the path of thecarrier but movable thereinto, and a key for moving said latter memberin its projected position to retract the bolt, said latter member beingautomatically retracted to normal position upon the projectmg movementof the latch-bolt.

16. In a lock, a casing, a latch-bolt extending into said casing, alatch-bolt oper ating spindle mounted on one side of a door, saidspindle having its inner end extending within said casing and havingsaid inner end enlarged radially, said enlarged portion having aperipheral notch and having its inner face formed to retract thelatch-bolt, and a locking member for said spindle, said member beingpermanently carried by the casing and having an element projectable intosaid notch to lock the spindle against movement, said member beingoperable solely from the opposing side of the door, the locking of thespindle normally prevent-- ing movement of the latch-bolt, and meanssupported by the spindle for retracting the latch-bolt Without affectingthe position of the projected element.

17 A latch-bolt retracting mechanism for locks comprising a casing, abarrel and tumbler mounted within said casing, said barrel beingnormally seated Within the easing, and means for preventing a rotarymovement of the barrel relatively to the cas ing While in its normalposition, said means permitting an axial movement of the barrel toproject a portion thereof longitudinally beyond the end of the casing,the barrel being rotatable when in such projected position.

18. A latch-bolt retracting mechanism for the purpose indicated,comprising a casing, a barrel and tumbler mounted within said casing,said barrel being normally seated within the casing, and means forpreventing a rotary movement of the barrel relatively to the casingwhile in its normal position, said means. permitting an axial movementof the barrel to project a portion thereof longitudinally beyond the endof the casin said axial movement being permitted when the barrel is in apredetermined position relative to the casing, the barrel beingrotatable in either direction when in its projected position.

19. A latch-bolt retracting mechanism comprising a casing, a barrel andtumbler mounted within said casing, said barrel be ing normally seatedwithin the casing, and means for preventing a rotary movement of thebarrel relatively to the casing while in its normal position, said meanspermitting an axial movement of the barrel to project a portion thereoflongitudinally beyond the end of the casing, said axial movement beingpermitted when the barrel is in a predetermined position relative to thecasing, the barrel being rotatable in either direction when in itsprojected position, a key for projecting and rotating said barrel, andindependent means for returning the barrel to its normal position.

20. A latch-bolt retracting mechanism comprising a casing, a barrel andtumbler mounted within said casing, said barrel being normally seatedwithin the casing, and means for preventing a rotary movement of thebarrel relatively to the casing while in its normal position, said meanspermitting an axial movement of the barrel to project a portion thereoflongitudinally beyond the end of the casing, said axial movement beingpermitted when the barrel is in a predetermined position relative to thecasing, the barrel being rotatable in either direction when in itsprojected position, a key for projecting and rotating said barrel, and aspring for returning the barrel to its normal position.

21. A selective key-operated lock actuator consisting of a set ofelements arranged adjacent to one another, one of said elements beingadapted to operate the locking member of a lock, and a casing in whichsaid elements are longitudinally and laterally movable, said casing andelements having cooperating projections and grooves, and the groovesconsisting of connected longitudinal and transverse portions, in each ofwhich longitudinal portions one of said projections is normallycontained, whereby said elements are prevented from lateral movementuntil all the corresponding projections and transverse grooves arebrought into registry.

22. A selective key-operated lock actuator consisting of a set of bars,and a casing in which said bars are contained with provision forlongitudinal and rotary movement, one of said bars being constructed tooperate the locking member of a lock, said casing and bars havingcooperating grooves and projections, the grooves consisting ofintersecting longitudinal and transverse portions, and one of saidprojections being in each longitudinal groove portion, whereby the barsare permitted to move freely longitudinally but are prevented fromrotating till each projection is adjacent to its respective transversegroove portion.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY V. SIMPSON.

Witnesses HOWARD COBB, GERTRUDE O. GRIFFIN.

